Fire protective doors, sidelites and openings where impact is a concern. 60-180 minute ratings are limited to 100 square inches in temperature rise doors, and up to the maximum size tested in non-temperature rise doors.

Fire protective doors, sidelites and openings where impact is a concern. 60-180 minute ratings are limited to 100 square inches in temperature rise doors, and up to the maximum size tested in non-temperature rise doors.